The answer is: one week. It took her one week to learn to ride a unicycle. Bryan still can't ride more than ten feet. I barely even get up on the seat. And the child orbits us in big, sweeping left-handed circles, smiling, held up by the wind.
All cavers, it seems, have a bat sticker on the rear of their vehicle and this caver is no different.
Here's a short video taken on Saturday afternoon, in the parking lot of a nearby church. There's still lots to learn, some priorities being how to get on by herself, and how to turn RIGHT (not left). But my daughter may now be the best unicycle-rider I know.